Remember those childhood games where you are given two nearly identical images and your objective was to find some number of subtle differences? Well, I shouldn't have to play that game when I'm using your damn website.I show here two examples of a common practice that is plaguing the modern web. First, a clipping from a project page on github.com.  And now the second image:  See the difference? My question is this: why? That edit button is the only component of the entire page that has a hide-by-default-unless-your-mouse-is-in-a-certain-vertical-and-horizontal-range behavi...